package changechecker;


import java.io.IOException;
import java.net.URL;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;

public class Wave extends Thread { //program to play sounds, downloaded somewhere and slightly changed

    private String filename;
 
    private Position curPosition;
 
    private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb
 
    enum Position {
        LEFT, RIGHT, NORMAL
    };
 
    public Wave(String wavfile) { //load the wave player normally
        filename = wavfile;
        curPosition = Position.NORMAL;
    }
 
    public Wave(String wavfile, Position p) { //load wave player with a certain position
        filename = wavfile;
        curPosition = p;
    }
    
    public void loop() { //can be looped instead of run.
        while (true){run();}
    }
 
    public void run() {
 
        URL soundUrl = getClass().getResource("/sounds/" + filename); //load an internal wave file
        AudioInputStream audioInputStream = null; //premade, have no knowlege of its workings.
        try {
            audioInputStream = AudioSystem.getAudioInputStream(soundUrl);
        } catch (UnsupportedAudioFileException e1) {
            e1.printStackTrace();
            return;
        } catch (IOException e1) {
            e1.printStackTrace();
            return;
        }
 
        AudioFormat format = audioInputStream.getFormat();
        SourceDataLine auline = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
 
        try {
            auline = (SourceDataLine) AudioSystem.getLine(info);
            auline.open(format);
        } catch (LineUnavailableException e) {
            e.printStackTrace();
            return;
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }
 
        if (auline.isControlSupported(FloatControl.Type.PAN)) {
            FloatControl pan = (FloatControl) auline
                    .getControl(FloatControl.Type.PAN);
            if (curPosition == Position.RIGHT)
                pan.setValue(1.0f);
            else if (curPosition == Position.LEFT)
                pan.setValue(-1.0f);
        } 
 
        auline.start();
        int nBytesRead = 0;
        byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
 
        try {
            while (nBytesRead != -1) {
                nBytesRead = audioInputStream.read(abData, 0, abData.length);
                if (nBytesRead >= 0)
                    auline.write(abData, 0, nBytesRead);
            }
        } catch (IOException e) {
            e.printStackTrace();
            return;
        } finally {
            auline.drain();
            auline.close();
        }
 
    }
}
